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INDEBTEDNESS (Narrative) (Details)
 12 Months Ended
Nov. 27, 2017
shares
Nov. 15, 2017
USD ($)
Oct. 24, 2016
USD ($)
Sep. 29, 2017
USD ($)
Sep. 30, 2016
USD ($)
Oct. 02, 2015
USD ($)
Line of Credit Facility [Line Items]            
Repayments of debt       $ 7,376,000 $ 332,000 $ 360,000
Long-term line of credit borrowings       0 0  
Weighted average borrowing rate for short-term debt           1.40%
Subsequent Event            
Line of Credit Facility [Line Items]            
Voting power of shares closely held, percent 77.00%          
Class A | Subsequent Event            
Line of Credit Facility [Line Items]            
Number of closely held shares (shares) | shares 3,832,267          
Outstanding shares closely held, percent 44.00%          
Class B | Subsequent Event            
Line of Credit Facility [Line Items]            
Number of closely held shares (shares) | shares 1,211,196          
Outstanding shares closely held, percent 99.90%          
Financial Standby Letter of Credit            
Line of Credit Facility [Line Items]            
Letters of credit outstanding       279,000 392,000  
LIBOR | Minimum | Subsequent Event            
Line of Credit Facility [Line Items]            
Margin range   1.00%        
LIBOR | Maximum | Subsequent Event            
Line of Credit Facility [Line Items]            
Margin range   1.75%        
Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Long-term line of credit borrowings       $ 0 $ 0  
Weighted average borrowing rate for short-term debt       2.50% 1.70%  
Line of credit facility, maximum borrowing capacity for acquisitions       $ 20,000,000    
Line of credit facility, leverage ratio       2.5    
Line of credit facility, minimum borrowing availability at time of acquisition       $ 10,000,000    
Maximum aggregate amount of dividends or repurchases of common stock per year       $ 10,000,000    
Revolving Credit Facility | Subsequent Event            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity   $ 75,000,000        
Revolving Credit Facility | LIBOR | Minimum            
Line of Credit Facility [Line Items]            
Margin range       1.25%    
Revolving Credit Facility | LIBOR | Maximum            
Line of Credit Facility [Line Items]            
Margin range       2.00%    
Revolving Credit Facility | Revolvers Borrowing Capacity Standard            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity       $ 90,000,000    
Revolving Credit Facility | Revolvers Borrowing Capacity Seasonal            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity       60,000,000    
Unsecured Revolving Credit Facilities At Foreign Subsidiaries            
Line of Credit Facility [Line Items]            
Long-term line of credit borrowings       0    
Unsecured Line Of Credit            
Line of Credit Facility [Line Items]            
Long-term line of credit borrowings       $ 0 $ 0  
Term Loans            
Line of Credit Facility [Line Items]            
Repayments of debt     $ 7,068,000      
Pre-payment penalty percent       3.00%    
Interest rate in effect       5.50%